EP3914042A1 - Dispositif de cuisson, ustensile de cuisine et procédés associés - Google Patents

Dispositif de cuisson, ustensile de cuisine et procédés associés Download PDF

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Publication number
EP3914042A1
EP3914042A1 EP20175672.3A EP20175672A EP3914042A1 EP 3914042 A1 EP3914042 A1 EP 3914042A1 EP 20175672 A EP20175672 A EP 20175672A EP 3914042 A1 EP3914042 A1 EP 3914042A1
Authority
EP
European Patent Office
Prior art keywords
cooking
cookware
wireless communication
communication device
cooking plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20175672.3A
Other languages
German (de)
English (en)
Inventor
Herbert Hopfgartner
Walther Pachler
Juan Ángel SERRANO GÓMEZ
Harald Witschnig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infineon Technologies Austria AG
Original Assignee
Infineon Technologies Austria AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Infineon Technologies Austria AG filed Critical Infineon Technologies Austria AG
Priority to EP20175672.3A priority Critical patent/EP3914042A1/fr
Publication of EP3914042A1 publication Critical patent/EP3914042A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/32—Time-controlled igniting mechanisms or alarm devices
    • A47J36/321—Time-controlled igniting mechanisms or alarm devices the electronic control being performed over a network, e.g. by means of a handheld device
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1236—Cooking devices induction cooking plates or the like and devices to be used in combination with them adapted to induce current in a coil to supply power to a device and electrical heating devices powered in this way
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/06—Cook-top or cookware capable of communicating with each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present application relates to cooking devices, cookware and related methods.
  • a cooking device For cooking hot food, usually some kind of cookware like a pot or a pan is placed on a cooking plate of a cooking device like a tabletop cooker or a multi-hob stove.
  • One kind of cooking device is an induction cooking device, which generates a varying magnetic field to induce eddy currents in the cookware. The eddy currents flow through the electrical resistance of the cookware, thereby heating the cookware via Joule heating.
  • a current pulse is applied to a coil in the induction cooking device.
  • the cookware if present
  • the inductive coil and a resonant capacitor coupled to the coil form a resonance circuit.
  • This current pulse causes a current and a resonance oscillation. If cookware is present, the current is lower and the resonance oscillation is dampened quickly due to the resistance of the cookware. If cookware is not present, the resonance oscillation decays significantly more slowly.
  • the conventional solutions may also determine the type of cookware based on how quickly the resonance oscillation is dampened. Therefore, by measuring the decay time, amplitude or both of the oscillations presence of cookware may be detected.
  • Various resonance topologies may be used for forming the resonance circuit. For example, in table top cookers typically single-ended parallel resonance topologies (SEPR) are used whereas multi-hob stoves typically use a half-bridge series resonance topology (HBSR).
  • SEPR single-ended parallel resonance topologies
  • HBSR half-bridge series resonance topology
  • Such test pulses causes stress for electrical components used in the cooking device, as a high energy resulting from the pulse needs to be dissipated.
  • electrical components may include transistors like insulated gate bipolar transistors (IGBTs) used for switching the current in the coil.
  • IGBTs insulated gate bipolar transistors
  • control algorithms for controlling the power supplied to a cooking plate cannot be optimized for current cooking devices, as there are many different types and designs of cookware, and it may be hard to regulate the cooking temperature precisely.
  • a cooking device as defined in claim 1 and a cookware as defined in claim 11 are provided.
  • the dependent claims define further embodiments.
  • a cooking device comprising:
  • a cookware for induction cooking comprising: a wireless communication device configured to communicate with a cooking device, wherein the wireless communication device is configured to be powered by signals received from the cooking device.
  • Fig. 1 illustrates a system including a cooking device 10 according to an embodiment and a cookware 11 according to an embodiment.
  • a cooking device as used herein refers to a device comprising one or more cooking plates which may be used to heat cookware.
  • cooking device 10 comprises a single cooking plate 15.
  • cooking device 10 may be a multi-hob stove having a plurality of cooking plates, for example four cooking plates.
  • each of the cooking plates may be operated as explained for cooking plate 15 below.
  • some elements like a controller described below or transmit/receive circuitry may be common for all cooking plates, with a separate antenna for each cooking plate.
  • some cooking plates may be implemented using techniques as discussed herein, and other cooking plates may be implemented in a conventional manner.
  • cooking plate 15 may be an induction cooking plate.
  • Cooking plate 15 is controlled by a controller 14.
  • controller 14 may supply current to cooking plate 15 to obtain heating of cookware 11.
  • controller 14 may be implemented as in conventional cooking devices.
  • controller is not to be construed as being limited to a single device.
  • controller 14 may comprise a first subcontroller controlling cooking plate 15 and a second subcontroller for the wireless communication described below, the first and second subcontrollers communicating with each other.
  • Cookware 11 may be any suitable cookware that may be placed on a cooking plate to be heated like a pot, a pan, a casserole or the like.
  • cookware 11 may be a cookware for induction cooking.
  • Cooking device 10 comprises a wireless communication device 12, which in the embodiment of Fig. 1 is arranged in cooking plate 10.
  • cookware 11 comprises a wireless communication device 13, which in the embodiment of Fig. 1 is embedded in a bottom of cookware 11, such that wireless communication devices 12 and 13 are arranged close to each other when cookware 11 is set on cooking plate 15.
  • wireless communication devices 12, 13 may be near field communication (NFC) devices.
  • wireless communication device 13 may not include its own power source, but may be powered by cooking device 11 using electromagnetic radiation, for example be implemented as radio frequency identification (RFID) tag or including one. Other types of wireless communication devices may also be used.
  • RFID radio frequency identification
  • Wireless communication devices 12, 13 may be used to provide information from cookware 11 to cooking device 10. This information may then be processed in cooking device 10 and may for example be used to control cooking, for example by controlling power supplied to cooking plate 15. This will be further illustrated referring to Fig. 2 , which shows a flowchart illustrating a method according to an embodiment.
  • Fig. 2 may be implemented in the system of Fig. 1 or in any of the systems, cooking devices and cookware described further below. For illustration, the method will be explained referring to Fig. 1 . However, it is to be understood that the method may also be implemented in other systems, cooking devices and cookware than the ones explicitly shown and described herein.
  • the method comprises transmitting information from a cookware to a cooking device using wireless communication, for example wireless communication devices 12, 13 of Fig. 1 .
  • wireless communication for example wireless communication devices 12, 13 of Fig. 1 .
  • controller 14 may cause wireless communication device 12 to transmit a signal to wireless communication device 13.
  • this signal may also provide wireless communication device 13 with power.
  • wireless communication device 13 transmits information to wireless communication device 12.
  • the method of Fig. 2 then comprises processing the information in the cooking device, for example in controller 14 of Fig. 1 .
  • processing the information may comprise controlling the cooking plate, for example power supplied thereto, on the basis of the information.
  • the information indicates presence of cookware like cookware 11 on a cooking plate like cooking plate 15.
  • the cooking device transmits a signal, and if a response is received, the cooking device knows that cookware is present. If no signal is received, the cooking device assumes that no cookware is present.
  • the cooking device may apply a current pulse to an induction coil of a cooking plate, to detect presence of cookware in the conventional manner discussed in the background section. If no cookware is found to be present, in some embodiments no power is supplied to a cooking plate like cooking plate 15. In other words, cooking is only enabled if the information indicates that cookware is present on the cooking plate.
  • the information may comprise an indication of a type of cookware.
  • the information may indicate if the cookware is a pot or a pan, may indicate a size of the cookware (large pan, large pot, small pot, small pan), or may even give more detailed information about the cookware like wall thickness, manufacturer, etc.
  • the cooking plate may be controlled based on the information. For example, only certain types of cookware may be allowed by a manufacturer of the cooking device to be used (for example only cookware from specific manufacturers), or the power supplied may be controlled based on the size of the cookware (for example more power for larger size cookware with the same settings).
  • the cookware may also include a temperature sensor, and the information may include an indication of the temperature.
  • the cooking plate may be controlled such that a predefined temperature profile is obtained over time. In case of a steak frying in a pan, first a high temperature may be used for a short period of time and then a lower temperature for a longer period of time. In other cases, a certain temperature (for example boiling temperature of 100°C) may be maintained for a predefined time. In such a way, cooking may be at least partially automated.
  • such a temperature indication may be used to implement a safety feature.
  • the cooking plate may be turned off if a very high temperature is maintained for longer than a predefined time, for example 10 minutes. Instead of turning off the cooking plate, also first a message may be output to a user requiring confirmation that the high temperature is intentional, and if no such confirmation is received, the cooking plate may be turned off.
  • Other safety conditions than a temperature threshold may also be used. For example, a temperature increase above a predefined increase threshold for more than a predefined time period may indicate a problematic condition, and then power supplied to the cooking plate may be interrupted or a user confirmation may be demanded, as explained above.
  • Fig. 3 illustrates a system according to a further embodiment.
  • the system of Fig. 3 comprises a cookware 30 in the form of a pot and a cooking device 34.
  • the cooking device is an induction cooking device comprising an induction coil 37.
  • Induction coil 37 is powered by a power electronics board 38, as in any conventional induction cooking device.
  • a near field communication transceiver antenna 36 also in the form of a coil, is provided, coupled to human machine interface (HMI) and near field communication (NFC) electronics 35.
  • HMI human machine interface
  • NFC near field communication
  • Human machine interface relates to communication with a user of the cooking device which may be implemented in any conventional manner known for cooking devices.
  • Electronics 35 may control power electronics board 38 for supplying induction coil 37 with power.
  • Cookware 30 comprises a near field communication antenna 33, a near field communication integrated circuit (NFC-IC) 32 and a temperature sensor 31.
  • NFC-IC near field communication integrated circuit
  • a communication as explained above with reference to Fig. 2 may be effected between electronics 35 and near field communication integrated circuit 32, including the communication of a temperature indication of a temperature measured by temperature sensor 31.
  • an induction coil 37 separate from near field communication antenna 36 is shown, in other embodiments, the induction coil like induction coil 37 may additionally serve as near field communication antenna or other antenna of a wireless communication device, such that no separate antenna may have to be provided in such embodiments.
  • electronics 35 are coupled to induction coil 37, and antenna 36 is omitted.
  • the signal emitted from induction coil 37 for inductive heating may be significantly stronger than the one used for near field communication (for example, depending on implementation, 5 to 20 times stronger), such that in some implementations, sending both signals at the same time may lead to a very high noise background (by the induction heating) for the near field communication signal.
  • the near field communication signals may be sent at times where no current is supplied to induction coil 37. This will be explained referring to Fig. 4 .
  • a curve 40 shows a switch control signal 40 controlling switches for example of power electronics board 38 to supply induction coil 37 with power.
  • switches for example of power electronics board 38 to supply induction coil 37 with power.
  • periods T on where the switches are turned on and power is supplied to the induction coil
  • periods T off where no power is supplied.
  • these periods T off are used for a near field communication signal 41.
  • a near field communication has a duration of 100 ms or less, so that not much time is required for near field communication.
  • T off in conventional cooking devices may be at 0.
  • T NFC for near field communication is short
  • short periods T off allowing near field communication may be inserted without losing significant power.
  • near field communication for example for temperature measurement purposes
  • This may also be used in case a cooking device does not use current pulses, but a constant current supply for heating (for example different current levels for different amounts of heating). In this case, the heating current may be interrupted by short periods T off during which near field communication is performed.
  • FIG. 5A shows an induction cooking signal 50 (voltage applied to an induction coil)
  • Fig. 5B shows an NFC signal 51 on the same voltage scale as Fig. 5A
  • Fig. 5C shows NFC signal 51 of Fig. 5B with an enlarged voltage scale, where arrows 52 mark instants where NFC communication occurs.
  • the amplitude of the NFC signal 51 is significantly lower than the amplitude of induction cooking signal 50. Therefore, providing NFC communication in periods where no induction cooking signal is applied, as explained above may help to ensure correct NFC communication.
  • Figs. 5A to 5C are merely used as an example to illustrate the different levels of the amplitudes of the induction cooking signal and the NFC signal.
  • the voltage scales should not be construed to limit the invention to the exact voltage levels shown in Figs. 5a to 5C .
  • a wireless communication device may be installed in a recess in a bottom of the cookware. This is shown in Fig. 6A and 6B for a pot 60 where Fig. 6B is an enlarged view of an area 62 of Fig. 6A .
  • An NFC tag 61 including an antenna and an NFC chip is provided in a milled recess in the bottom of pot 60.
  • a ferrite shield may be provided between tag 61 and pot 60 to provide shielding between the metal of pot 60 and tag 61. Use of such a ferrite shielding is further illustrated referring to Fig. 7 .
  • Fig. 7 illustrates a schematic cross-sectional view of a cookware of a system according to an embodiment.
  • a wireless communication device for example NFC tag
  • a wireless communication device 73 coupled with reading/writing circuitry 74 (for example antenna 36 coupled with electronics 35 of Fig. 3 ) is provided.
  • a ferrite sheet 71 is provided between wireless communication device 72 and the metallic bottom 70 of the cookware to shield the wireless communication device 72 from the metal surface of bottom 70.
  • magnetic flux lines penetrate through ferrite shield 71.
  • another ferrite sheet (not shown in Fig. 7 ) may be provided between wireless communication device 73 and reading/writing circuitry 74 for shielding on the side of the cookware.
EP20175672.3A 2020-05-20 2020-05-20 Dispositif de cuisson, ustensile de cuisine et procédés associés Withdrawn EP3914042A1 (fr)

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EP20175672.3A EP3914042A1 (fr) 2020-05-20 2020-05-20 Dispositif de cuisson, ustensile de cuisine et procédés associés

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EP20175672.3A EP3914042A1 (fr) 2020-05-20 2020-05-20 Dispositif de cuisson, ustensile de cuisine et procédés associés

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022165546A1 (fr) * 2021-02-02 2022-08-11 Sensideon Gmbh Dispositif de détection de la température de la base d'un ustensile de cuisson posé sur une table de cuisson, indépendamment de l'orientation
DE102022205386A1 (de) 2022-05-30 2023-11-30 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld mit einer Trägerstruktur mit Antennen und/oder Sensoren, Verfahren zur Herstellung einer solchen Trägerstruktur und eine Verwendung einer Trägerstruktur für ein Induktionskochfeld

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708545A2 (fr) * 2005-03-31 2006-10-04 BSH Bosch und Siemens Hausgeräte GmbH Appareil de chauffage à induction
EP2605615A2 (fr) * 2011-12-16 2013-06-19 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de transmission de données, dispositif de chauffage à induction, récipient de cuisson pouvant être réchauffé par induction et système
WO2013098240A1 (fr) * 2011-12-30 2013-07-04 Arcelik Anonim Sirketi Système de communication de table de cuisson chauffant par induction
WO2014016032A1 (fr) * 2012-07-27 2014-01-30 Arcelik Anonim Sirketi Plan de cuisson à chauffage à induction et appareil de cuisine sans fil
DE102015222797A1 (de) * 2015-11-18 2017-05-18 BSH Hausgeräte GmbH System mit Kochgerät und Kochgeschirr
DE112015007050T5 (de) * 2015-10-23 2018-07-05 Mitsubishi Electric Corporation Induktionswärme-Kochvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708545A2 (fr) * 2005-03-31 2006-10-04 BSH Bosch und Siemens Hausgeräte GmbH Appareil de chauffage à induction
EP2605615A2 (fr) * 2011-12-16 2013-06-19 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de transmission de données, dispositif de chauffage à induction, récipient de cuisson pouvant être réchauffé par induction et système
WO2013098240A1 (fr) * 2011-12-30 2013-07-04 Arcelik Anonim Sirketi Système de communication de table de cuisson chauffant par induction
WO2014016032A1 (fr) * 2012-07-27 2014-01-30 Arcelik Anonim Sirketi Plan de cuisson à chauffage à induction et appareil de cuisine sans fil
DE112015007050T5 (de) * 2015-10-23 2018-07-05 Mitsubishi Electric Corporation Induktionswärme-Kochvorrichtung
DE102015222797A1 (de) * 2015-11-18 2017-05-18 BSH Hausgeräte GmbH System mit Kochgerät und Kochgeschirr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022165546A1 (fr) * 2021-02-02 2022-08-11 Sensideon Gmbh Dispositif de détection de la température de la base d'un ustensile de cuisson posé sur une table de cuisson, indépendamment de l'orientation
DE102022205386A1 (de) 2022-05-30 2023-11-30 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld mit einer Trägerstruktur mit Antennen und/oder Sensoren, Verfahren zur Herstellung einer solchen Trägerstruktur und eine Verwendung einer Trägerstruktur für ein Induktionskochfeld
EP4287770A1 (fr) * 2022-05-30 2023-12-06 E.G.O. Elektro-Gerätebau GmbH Plaque de cuisson à induction comprenant une structure de support dotée d'antennes et/ou de capteurs, procédé de fabrication d'une telle structure de support et utilisation d'une structure de support pour plaque de cuisson à induction

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